After watching its competitors loosen up their data rates, Verizon has decided to get in on the action. Starting tomorrow the carrier will begin offering increased data allowances to customers committed to its More Everything service plans at no additional cost. Subscribers signed up for Big Red’s $110 12GB data plan will be bumped up to 15GB, while the carrier’s $130 16GB monthly setup will jump to 30GB.

Customers paying for 20GB to 50GB ($150 – $375 per month) of data will be eligible for double their monthly allowance, a promotion similar to what we’ve seen from Sprint and AT&T. Like its rivals, Verizon’s offer comes to an end on October 31st, so you’ll want to act fast to take advantage of this deal.

In other news, Verizon was originally set to start throttling its grandfathered unlimited data customers today, but it appears the carrier has had a change of heart. In a statement to GigaOM, a company spokesperson said the following:

Verizon is committed to providing its customers with an unparalleled mobile network experience. At a time of ever-increasing mobile broadband data usage, we not only take pride in the way we manage our network resources, but also take seriously our responsibility to deliver exceptional mobile service to every customer. We’ve greatly valued the ongoing dialogue over the past several months concerning network optimization and we’ve decided not to move forward with the planned implementation of network optimization for 4G LTE customers on unlimited plans. Exceptional network service will always be our priority and we remain committed to working closely with industry stakeholders to manage broadband issues so that American consumers get the world-class mobile service they expect and value.

So it looks like Verizon’s unlimited data holdouts are still managing to hang on, but considering the carrier’s track record, we can’t help but wonder if this new decision is actually permanent.